class ResponseLevel0(JSONResponse):
    media_type = "application/x-level-0"


class ResponseLevel1(JSONResponse):
    media_type = "application/x-level-1"


class ResponseLevel2(JSONResponse):
    media_type = "application/x-level-2"


class ResponseLevel3(JSONResponse):
    media_type = "application/x-level-3"


class ResponseLevel4(JSONResponse):
    media_type = "application/x-level-4"

Also, please note:
- using `application/vnd.kubernetes.protobuf` as the media storage type for 1.6 is default but not required
- the ability to rollback to etcd2 can be preserved by setting the storage media type flag on `kube-apiserver`

  ```
  --storage-media-type application/json
  ```

  to continue to use `application/json` as the storage media type which can be changed to

    String SUPPORTED_UPLOADED_CSS_EXTENTIONS = "supported.uploaded.css.extentions";

    /** The key of the configuration. e.g. jpg,jpeg,gif,png,swf */
    String SUPPORTED_UPLOADED_MEDIA_EXTENTIONS = "supported.uploaded.media.extentions";

    /** The key of the configuration. e.g. license.properties */
    String SUPPORTED_UPLOADED_FILES = "supported.uploaded.files";

* Fix typo in OAuth2 JWT tutorial. PR [#447](https://github.com/tiangolo/fastapi/pull/447) by [@pablogamboa](https://github.com/pablogamboa).
* Use the `media_type` parameter in `Body()` params to set the media type in OpenAPI for `requestBody`. PR [#439](https://github.com/tiangolo/fastapi/pull/439) by [@divums](https://github.com/divums).